Plumber&#39;s sanitary test-plug.



W. TURNER & F. ,'STALLA.

PLUMBERS SANITARY TEST PLUG.

APELIOATION FILED JANJS, 1909. 922,544. Patented May 25, 1909.

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'lllltllillhill WALTER TURNER AND FREDERICK STALLA, OF ELYRIA, OHIO.

PLUMBERS SANITARY TEST-PLUG.

Specification or" Letters Patent.

latented May 25, 1909.

Application nled January 13, 1909. Serial No. 472,017.

To all whom it may concern:

Be it known that we, llhirfrnn Turman and FREDERICK STALLA, citizens olJ the United States, residing at Elyria, in the county oll Lorain and State oi Ohio, have invented certain new and useiul improvements in Plumbers Sanitary Test-Plugs, ol' which the i'ollowing is a s eciiication.

Our invention re ates to a plumber-s sanitary test plug, and the invention consists in the construction and combination oi' parts, substantially as shown and described and particularly pointed out in the claims.

ln the accompanying drawings, Figure l is a side elevation oi' the plug, and a sectional elevation oi' the test pipe connections, and Fig. 2 is a sectional elevation oi' the plug. Fig. 3 is a cross section ci' the plug on line awr, Fig. 2, and Fig. 4 is a perspective detail oll one ol' the wedge shaped expansion members.

The invention as thus shown consists in sundry parts constructed and arranged to give a maximum expansion to the plug, considering the size of the respective parts, and to produce a grip or hold oi' such iirmness in the drain pipe that it cannot be blown out by the high pressure tests to which it is subjected and hence does not require artificial or other means to secure it in place.

To these several ends the plug comprises a central pipe A, threaded externally at both ends and carrying the disk shaped head B removably secured onto its outer threaded end 2, and the head C oppositely, which has a tapered outwardly extending tubular neck 3 i'or a pur ose to be presently seen and which head otherwise has the same purpose and function as head B, the plug being laterally expansible under compression between these parts.

D represents a rubber or other llexible ring oi` band shape by which the plug is di rectly engaged in drain pipe P, in connection with which the tests are made, and this engagement is eilected through the expanding mechanism within the plug and comprises the threaded pipe A, the said disks B and C mounted thereon as above described, the cone shaped nut E, and the split or divided ex Janding member composed ol'I substantia ly wedge shaped portions G, oi' which there are eight in this instance. llhese lie lengthwise between disks B and C in a circle next within the rubber or like engaging ring D and bear against the same uniformly all around. to obtain the expanding pressure and closure required in pipe l) Said parts G are thcrei'ore segmental in cross section. Expansion. is eiliected through hollow bolt N having a tubular body n and which is rotatably engaged over or upon pipe A and threaded at its inner end where it is engaged by cone shaped nut Said nut is internally threaded to engage upon and be tightened by said bolt, so that when the bolt is turned it will carry the nut in one direction or the other, to tighten or loosen the expanding parts E and G according to the direction ci rotation. rihe said nut E has l'ree travel axially between the two disks or heads B and C, and bears against the inner inclined surfaces 4 ol' the spreading members G. riChat is, the outer transversely rounded surfaces 5 oi said members G are parallel to the axis oi' the plug and the inner surfaces 4 are inclined to said axis, and the larger ends 6 come opposite the smaller end ol' nut E, Hence when the nut is tightened through the turning ot' the bolt the spreader segments or wedges G are expanded in parallel lines unii'ermly all around and engaging and sealing ring D is spread or expanded correspondingly. rlhe said bolt N bears against the outer end oi sleeve 3 on head C, while the so called lock-nut 7 on pipe A next outside oi' bolt N holds the head B in iixed relation to head C and the other arts. Said nut 7 is therefore both a coniining nut l'or adjusting bolt N, or a lock nut therefor, and also a medium for holding the heads B and C togetherl substantially as shown.

By these means we can so forcibly and ei'- iectually expand the plug in drain pipe l?, or the usual hub in said pipe, that it will not only stand the usual test ol` say two hundred and fil'ty pounds pressure, but a much greater pressure without blowing out, and no wiring or other extra means are required to hold. it in place.

iff hat we claim is:

l. in a plumbers sanitary test plug, an outer flexible band shaped ring, a series oi' expanding members arranged about the inside ci' said ring, a hollow bolt and a conical nut thereon within said expanding members adapted to spread said parts, and heads between which said parts are confined..

2. A plumber's test plug having substantially disk shaped heads and one of said heads provided with an outwardly extending tubular neck, a pipe extending through said neek and disks and threaded in the outer disk, in Combination with an outer flexible band shaped engaging ring, a spreader for said ring consisting o'l' a series o'l' substantially Wedge shaped members, and a cone shaped nut and a bolt sleeved over said pipe and engaged by said nut and adapted to spread said members and tighten said ring in engaging position. A

3. A plumbers test plug comprising a oentral cone shaped nut, a spreader consisting ol a series of Wedge shaped members arranged in a circle and engaged on their inner sides by said nut, a ilexble band about said f spreader and a tubular bolt having a threaded end engaging said oone shaped nut and adapted to expand said parts, in oombination with opposite heads Within the edges ol' which said band is seated and adapted to be compressed, and a pipe through said heads upon which said expansion nut and bolt are sleeved, said bolt having a head and hand grip bearing directly against one of said heads.

In testimony whereof We a'HiX our signatures in presence ol tWo Witnesses.

WALTER TURNER. FREDERICK STALLA.

Witnesses Mrs. E. STALLA, TIIERESA OHERN. 

